usbfanctrl/main.c

/***************************************************************************
 *   Copyright (C) 02/2021 by Olaf Rempel                                  *
 *   razzor@kopf-tisch.de                                                  *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; version 2 of the License,               *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
#include <avr/interrupt.h>
#include <avr/io.h>
#include <avr/power.h>

#include "event.h"
#include "ledfade.h"
#include "pwm.h"
#include "timer.h"
#include "usbcdc.h"

/* *********************************************************************** */


/* *************************************************************************
 * disable_wdt_timer
 * ************************************************************************* */
void disable_wdt_timer(void) __attribute__((naked, section(".init3")));
void disable_wdt_timer(void)
{
    MCUSR = 0;
    WDTCSR = (1<<WDCE) | (1<<WDE);
    WDTCSR = (0<<WDE);
} /* disable_wdt_timer */


/* *************************************************************************
 * main
 * ************************************************************************* */
int main(void)
{
    DDRD = (1<<PORTD5);
    PORTD = (1<<PORTD5);

    /* Disable clock division */
    clock_prescale_set(clock_div_1);

    usbcdc_init();
    timer_init();
    pwm_init();

    sei();

    // fade LEDs to max, set fan PWM to 50%
    event_queue(EVENT_TYPE_LEDFADE_COMMAND, EVENT_NUM_LED_CH0, EVENT_VALUE_LEDFADE_MAX);
    event_queue(EVENT_TYPE_LEDFADE_COMMAND, EVENT_NUM_LED_CH1, EVENT_VALUE_LEDFADE_MAX);
    event_queue(EVENT_TYPE_PWM_VALUE, EVENT_NUM_PWM_CH2, 0x8000);

    for (;;)
    {
        usbcdc_task();

        timer_check(0);

        event_entry_t* p_event = event_get();
        switch (p_event->type)
        {
            case EVENT_TYPE_TIMER_SET:
                timer_event_handler(p_event);
                break;

            case EVENT_TYPE_TIMER_ELAPSED:
                if (p_event->num == EVENT_NUM_TIMER_LEDFADE)
                {
                    ledfade_event_handler(p_event);
                }
                break;

            case EVENT_TYPE_PWM_VALUE:
                pwm_event_handler(p_event);
                break;

            case EVENT_TYPE_LEDFADE_COMMAND:
            case EVENT_TYPE_LEDFADE_VALUE:
                ledfade_event_handler(p_event);
                if (p_event->num == EVENT_NUM_LED_CH0)
                {
                    PORTD &= ~(1<<PORTD5);
                }
                break;

            case EVENT_TYPE_LEDFADE_STATUS:
                usbcdc_event_handler(p_event);
                if (p_event->num == EVENT_NUM_LED_CH0)
                {
                    PORTD |= (1<<PORTD5);
                }
                break;

            default:
                break;
        }

        event_clear(p_event);
    }
}